5.15g sample of gas containing only carbon and hydrogen has a volume of 785ml with a pressure of 1522 torr at a temperature of 280C. It is combusted in pure dry oxygen and the products are collected. They are collected to a temperature of -210C and the ice is removed and has a mass of 5.15g. The remainng gas has a pressure of 744 torr and a volume of 7.76L. What is the empirical formula and write a balance equation for this reaction including states of matter.
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